The launch of SpaceX's Falcon 9 rocket was called off less than 15 seconds before its planned liftoff on Saturday due to a concern with the vehicle's steering mechanism, CEO Elon Musk said.

The launch of the private space firm's Falcon 9 rocket carrying a Dragon cargo craft for the International Space Station (ISS) was scheduled to take place at 10:01 a.m. on Saturday, Feb. 18th. But, a slightly odd behavior of the rocket's upper stage engine steering system forced the company to call off the launch.

He later wrote that there is a 99 percent the flight would be fine, even without fully understanding the problem.

The countdown clock stopped at T-minus 13 seconds, and the pause led to the launch being scrubbed for the day. The rocket had only a 1-second chance to liftoff yesterday to deliver supplies to the ISS.

Confirming the cancellation of the launch, Musk wrote, "System was green for launch. I called it off . that 1% chance isn't worth rolling the dice . down to investigate."

The mission was pushed back at least by one day. On Sunday, SpaceX will have a backup opportunity at 9:38:59 a.m. EST or 1438:59 GMT, assuming the technical glitch is addressed and corrected.